Ariona
You had it right the first timeAgreed with Arowana (African or Jardini) and Knifefish; would say Snakehead but I'd guess they're also illegal there.
Alligator gar! But unfortunately they get just as big as a pima as well so that will not work in this situation.IMHO There's really no alternative to the power, growth, energy and vigour of the arapaima.
Alligator gar! But unfortunately they get just as big as a pima as well so that will not work in this situation.